I think there is a lot of proven science that would take issue with the statement that spectrum is a gimmick and you only need blue and white. Dana Riddle and others have shown spectrum makes a difference.As mentioned, they get used somewhat like T5s – use 4, 6 or 8 of them. Folks that complain about par issues usually tried to use just one strip for some reason.
Full spectrum is a gimmick. A combo of blue plus white LEDs is all it takes to grow bomb corals. But if you are sold on Red+Green+Blue+White=full spectrum or some other derivation, there is still really no shortage of options. GHL, Orphek as well as numerous Chinese vendors.